diff --git a/samples/client/petstore/csharp/SwaggerClient/IO.Swagger.sln b/samples/client/petstore/csharp/SwaggerClient/IO.Swagger.sln
index 7aa9bf44c39..4b433720f5c 100644
--- a/samples/client/petstore/csharp/SwaggerClient/IO.Swagger.sln
+++ b/samples/client/petstore/csharp/SwaggerClient/IO.Swagger.sln
@@ -2,7 +2,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2012
 VisualStudioVersion = 12.0.0.0
 MinimumVisualStudioVersion = 10.0.0.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO.Swagger", "src\IO.Swagger\IO.Swagger.csproj", "{B4460E5B-0F76-4FD0-A23A-50FAEE57DFE8}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO.Swagger", "src\IO.Swagger\IO.Swagger.csproj", "{321C8C3F-0156-40C1-AE42-D59761FB9B6C}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO.Swagger.Test", "src\IO.Swagger.Test\IO.Swagger.Test.csproj", "{19F1DEBC-DE5E-4517-8062-F000CD499087}"
 EndProject
@@ -12,10 +12,10 @@ Debug|Any CPU = Debug|Any CPU
 Release|Any CPU = Release|Any CPU
 EndGlobalSection
 GlobalSection(ProjectConfigurationPlatforms) = postSolution
-{B4460E5B-0F76-4FD0-A23A-50FAEE57DFE8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-{B4460E5B-0F76-4FD0-A23A-50FAEE57DFE8}.Debug|Any CPU.Build.0 = Debug|Any CPU
-{B4460E5B-0F76-4FD0-A23A-50FAEE57DFE8}.Release|Any CPU.ActiveCfg = Release|Any CPU
-{B4460E5B-0F76-4FD0-A23A-50FAEE57DFE8}.Release|Any CPU.Build.0 = Release|Any CPU
+{321C8C3F-0156-40C1-AE42-D59761FB9B6C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+{321C8C3F-0156-40C1-AE42-D59761FB9B6C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+{321C8C3F-0156-40C1-AE42-D59761FB9B6C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+{321C8C3F-0156-40C1-AE42-D59761FB9B6C}.Release|Any CPU.Build.0 = Release|Any CPU
 {19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 {19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.Build.0 = Debug|Any CPU
 {19F1DEBC-DE5E-4517-8062-F000CD499087}.Release|Any CPU.ActiveCfg = Release|Any CPU
diff --git a/samples/client/petstore/csharp/SwaggerClient/src/IO.Swagger/IO.Swagger.csproj b/samples/client/petstore/csharp/SwaggerClient/src/IO.Swagger/IO.Swagger.csproj
index 3e857367780..6f55d545b7a 100644
--- a/samples/client/petstore/csharp/SwaggerClient/src/IO.Swagger/IO.Swagger.csproj
+++ b/samples/client/petstore/csharp/SwaggerClient/src/IO.Swagger/IO.Swagger.csproj
@@ -12,7 +12,7 @@ Contact: apiteam@swagger.io
     
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{B4460E5B-0F76-4FD0-A23A-50FAEE57DFE8}</ProjectGuid>
+    <ProjectGuid>{321C8C3F-0156-40C1-AE42-D59761FB9B6C}</ProjectGuid>
     <OutputType>Library</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>IO.Swagger</RootNamespace>
diff --git a/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/IO.Swagger.sln b/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/IO.Swagger.sln
index ca37d1cac98..4a35e02519c 100644
--- a/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/IO.Swagger.sln
+++ b/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/IO.Swagger.sln
@@ -2,7 +2,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2012
 VisualStudioVersion = 12.0.0.0
 MinimumVisualStudioVersion = 10.0.0.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO.Swagger", "src\IO.Swagger\IO.Swagger.csproj", "{6C01F92F-3611-4F84-AC86-927E3625E0A8}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO.Swagger", "src\IO.Swagger\IO.Swagger.csproj", "{5CD900DE-8266-412F-A758-28E1F9C623D5}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IO.Swagger.Test", "src\IO.Swagger.Test\IO.Swagger.Test.csproj", "{19F1DEBC-DE5E-4517-8062-F000CD499087}"
 EndProject
@@ -12,10 +12,10 @@ Debug|Any CPU = Debug|Any CPU
 Release|Any CPU = Release|Any CPU
 EndGlobalSection
 GlobalSection(ProjectConfigurationPlatforms) = postSolution
-{6C01F92F-3611-4F84-AC86-927E3625E0A8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-{6C01F92F-3611-4F84-AC86-927E3625E0A8}.Debug|Any CPU.Build.0 = Debug|Any CPU
-{6C01F92F-3611-4F84-AC86-927E3625E0A8}.Release|Any CPU.ActiveCfg = Release|Any CPU
-{6C01F92F-3611-4F84-AC86-927E3625E0A8}.Release|Any CPU.Build.0 = Release|Any CPU
+{5CD900DE-8266-412F-A758-28E1F9C623D5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+{5CD900DE-8266-412F-A758-28E1F9C623D5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+{5CD900DE-8266-412F-A758-28E1F9C623D5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+{5CD900DE-8266-412F-A758-28E1F9C623D5}.Release|Any CPU.Build.0 = Release|Any CPU
 {19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 {19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.Build.0 = Debug|Any CPU
 {19F1DEBC-DE5E-4517-8062-F000CD499087}.Release|Any CPU.ActiveCfg = Release|Any CPU
diff --git a/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger.Test/IO.Swagger.Test.csproj b/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger.Test/IO.Swagger.Test.csproj
index c77176f53b0..a5e34c3155f 100644
--- a/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger.Test/IO.Swagger.Test.csproj
+++ b/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger.Test/IO.Swagger.Test.csproj
@@ -74,7 +74,7 @@ Contact: apiteam@swagger.io
   <Import Project="$(MsBuildToolsPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
       <ProjectReference Include="..\IO.Swagger\IO.Swagger.csproj">
-          <Project>{6C01F92F-3611-4F84-AC86-927E3625E0A8}</Project>
+          <Project>{5CD900DE-8266-412F-A758-28E1F9C623D5}</Project>
           <Name>IO.Swagger</Name>
       </ProjectReference>
   </ItemGroup>
diff --git a/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger/IO.Swagger.csproj b/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger/IO.Swagger.csproj
index 4143279893c..27f887c6aa9 100644
--- a/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger/IO.Swagger.csproj
+++ b/samples/client/petstore/csharp/SwaggerClientWithPropertyChanged/src/IO.Swagger/IO.Swagger.csproj
@@ -12,7 +12,7 @@ Contact: apiteam@swagger.io
     
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{6C01F92F-3611-4F84-AC86-927E3625E0A8}</ProjectGuid>
+    <ProjectGuid>{5CD900DE-8266-412F-A758-28E1F9C623D5}</ProjectGuid>
     <OutputType>Library</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>IO.Swagger</RootNamespace>